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During a short-circuit test, a Y-connected synchronous generator produces 100 A of short-circuit armature current per phase at a field current of 2.5 A. At the same field current, the open-circuit line voltage is measured to be 440 V.
(a) Calculate the saturated synchronous reactance under these conditions.
(b) If the armature resistance is 0.3 ? per phase, and the generator supplies 60 A to a purely resistive Y-connected load of 3 ? per phase at this field current setting, determine the voltage regulation under these load conditions.
A constant current source of 2 mA is placed across a fully discharged capacitor of 100 F. In the time period before the capacitor reaches breakdown voltage, what is the time rate of change of voltage across the capacitor in V/s
A team of scientists is designing a radar as a probe for measuring the depth of the ice layer over the Antarctic land mass.To measure a detectable echo due to the reflection by the ice-rock boundary, the thickness of the ice sheet should not excee..
Check the stability of the resulting design using CAD modeling over the frequency range of 1-12 GHz, or by using stability circles at a few frequencies.
Design a 7.5V zener regulator circuit using a 7.5V zener specified at 12mA. The zener has an incremental resistance of r and a knee current of 0.5mA. The regulator operates from a 10V supply and has a 1.2k-ohm load.
Draw a circuit for a free-running counter that counts 32 clock cycles and produces a control signal that is 1 during every 4th, 20th and 24th cycle.
Immediately after the explosion, the velocity of the 1200 kg upper stage is 5700 m/s in the same direction as before. What is the velocity (magnitude and direction) of the 2400 kg lower stage after the explosion
Discuss how sampling theory provides the necessary information to convert a continuous-time signal into a discrete-time signal and then into a digital signal with minimum error. Discuss the parameters that determine the sampling rate
The voltage across a 1x10^(-6)F capacitor is given by v(t)=100e^(-100t) in which time t is in seconds. 1. find an expression for the current 2. find an expression for the power 3. find an expression for the stored energy
During the k^th sampling interval of a CVSD modulation scheme, the current value of input x(k) is 1000, the previous value of approximating staircase function x f(k-1) is 990, and the current value of ä(k-1) is 30
Describe the basic operation of the n-channel MOSFET, the relationship to VGS, VDS an IDS. This would include such things as accumulation, inversion, pinch-off point, etc. Which end is the drain
Design a logic circuit to control electrical power to the engine ignition of a speed boat. Logic output I is to becomehigh if ignition power is to be applied and is to remain lowotherwise. Gasoline fumes in the engine compartment present aserious ..
The cross-sectional area of each of the outer limbs is 0.0004m2 and each with a mean path length of 0.2m. The cross-sectional area of the centre limb 0.0008m2 and has a mean path length of 0.08m. A 308-turn coil is wound on the centre limb. What va..
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